I think letting the guild know ahead is a good idea. You can set an afternoon or even a 2 hour window for guild members and friends to come first - kind of an open house. It would help to thin out your inventory and reduce the amount of lifting for the garage sale. With guild members, they know the value of things. And even more importantly, you know them and which ladies are doing charity work, which ladies might be financially strapped, etc., so that you can cut deals and offer lower prices as you choose.